Fix counting

tools/check-changelog

@@ -1,14 +1,14 @@
 #!/bin/sh
 
-echo $CI_MERGE_REQUEST_IID
-ls changelog.d
+echo "looking for change log of $CI_MERGE_REQUEST_IID"
+
 count=0
 for i in add remove fix security skip; do
     [ -f changelog.d/"$CI_MERGE_REQUEST_IID"."$i" ]
     retcode=$?
     if [ $retcode -eq 0 ]; then
         echo "found $CI_MERGE_REQUEST_IID.$i"
-        count=$(( count++ ))
+        count=$(( count + 1 ))
     else
         echo "no $CI_MERGE_REQUEST_IID.$i"
     fi